VSC8247YJB-02 - 8.5-11.3 Gbps Quad CDR | Microchip
MPN: VSC8247YJB-02 ✓ ActiveVSC8247YJB-02 Overview
A clock and data recovery IC is a timing and signal-integrity component that extracts or reconstructs a usable clock from a high-speed serial data stream. It belongs to the clock and timing IC hierarchy within broader interface and semiconductor systems. By recovering timing information and retiming data, a CDR can reduce accumulated jitter and help a receiver interpret a serial signal reliably. The VSC8247 combines four channels in one package for multi-lane networking, optical-module, and backplane applications where parallel channel density is important.
The VSC8247 operates across an 8.5 Gbps to 11.3 Gbps line rate, allowing one device family to cover multiple high-speed protocols. Supported applications include 10G Ethernet, SONET, 8G Fibre Channel, 10G QDR InfiniBand, and legacy rates. Its four-channel architecture also makes it suitable for emerging 4×10G and 10×10G CFP-module architectures, as well as high-density photonic integrated circuit designs. Four outputs give each recovered channel a corresponding output path for downstream circuitry.
The device integrates clock recovery and retiming functions rather than functioning only as a passive clock distributor. Retiming establishes a new sampling boundary for received serial data, while clock recovery provides a stable timing reference for the associated channel. This is important in multi-gigabit links where transmission-line effects, package parasitics, connector transitions, and inter-symbol interference can degrade the eye opening. The Microchip VSC8247 datasheet identifies the family as a versatile CDR and retimer for 10G-class serial communication.
Typical deployments include 10G Ethernet equipment, SONET/SDH interfaces, Fibre Channel systems, QDR InfiniBand links, CFP optical modules, and high-density photonic integrated circuits. The quad-port configuration reduces the number of discrete timing devices needed in a four-lane design, while a single 13 mm by 13 mm FCBGA can support dense line-card and pluggable-module layouts.
Designers should evaluate the complete receiver channel rather than relying on nominal line-rate capability alone. Signal losses, connector and package parasitics, reference-clock quality, board-level jitter, and the available power architecture can all affect margin. Confirm the manufacturer’s recommended layout, reference-clock requirements, decoupling network, impedance-controlled interfaces, and thermal conditions against the Microchip VSC8247 datasheet before releasing a high-speed PCB.
This product summary consolidates the verified operating range, channel count, output count, supported protocols, package information, and manufacturer datasheet reference for engineers evaluating the VSC8247YJB-02 in high-speed serial-interface designs.
Drop-in alternatives for VSC8247YJB-02 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesVSC8247YJB-02 Specifications
| Product Type | Clock and Data Recovery (CDR) and Retimer IC |
| Channel Count | 4 channels |
| Output Count | 4 outputs |
| Operating Line Rate | 8.5 Gbps to 11.3 Gbps |
| Minimum Supported Line Rate | 8.5 Gbps |
| Maximum Supported Line Rate | 11.3 Gbps |
| Ethernet Support | 10G Ethernet |
| Telecom Support | SONET and SDH applications |
| Fibre Channel Support | 8G Fibre Channel |
| InfiniBand Support | 10G QDR InfiniBand protocols |
| Legacy Rate Support | Supported |
| Package | 144-FCBGA (13 mm x 13 mm) |
| Mounting Type | Surface Mount |
VSC8247YJB-02 144-fcbga (13 mm x 13 mm) Pin Configuration Guide
Pin configuration for VSC8247YJB-02 (144-fcbga (13 mm x 13 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for VSC8247YJB-02.
Refer to the datasheet for full pin configuration.
Typical Applications
VSC8247YJB-02 is suitable for 6 applications: 10G Ethernet Receive Channels, SONET and SDH Line Interfaces, 8G Fibre Channel Links, 10G QDR InfiniBand Interconnects, CFP Optical Module Interfaces, Photonic Integrated Circuit Systems.
10G Ethernet Receive Channels
The VSC8247YJB-02 fits four-lane 10G Ethernet receive paths because it combines four CDR channels with four outputs over an 8.5 Gbps to 11.3 Gbps operating range. Each channel can recover timing and retime a high-speed serial stream before downstream decoding or packet-processing circuitry. This channel density reduces the number of separate recovery devices required in a line card. According to the Microchip VSC8247 datasheet, 10G Ethernet is a supported application. Final qualification should include channel-loss, jitter, reference-clock, and Ethernet-protocol testing.
Recommended
SONET and SDH Line Interfaces
The VSC8247YJB-02 is appropriate for multi-channel SONET and SDH interface designs requiring clock recovery from high-speed serial data. Its 8.5 Gbps to 11.3 Gbps range covers the operating region identified for the VSC8247 family, while four channels and four outputs support parallel receiver integration. Clock recovery and data retiming can establish a cleaner sampling boundary before signal reaches the next processing stage. The Microchip VSC8247 datasheet explicitly identifies SONET and SDH among supported applications.
Recommended
8G Fibre Channel Links
The VSC8247YJB-02 can support 8G Fibre Channel receivers because the Microchip VSC8247 family is specified for 8G Fibre Channel protocols. Four recovered channels in one device can simplify the timing architecture of a multi-lane storage interface while reducing board area compared with discrete single-channel implementations. The 144-FCBGA package still requires careful escape routing and controlled impedance. Designers should verify jitter performance, channel margin, reference-clock quality, and protocol-specific test results on the finished interconnect.
Recommended
10G QDR InfiniBand Interconnects
The VSC8247YJB-02 aligns with 10G QDR InfiniBand links because the Microchip family supports 10G QDR InfiniBand protocols and operates from 8.5 Gbps to 11.3 Gbps. Four channels allow a compact implementation of a multi-lane receive path, with one recovery and retiming channel assigned to each high-speed lane. This is especially useful where board area and channel density are important. The implementation must still account for insertion loss, connector transitions, package parasitics, jitter budget, and compliant test procedures.
Recommended
CFP Optical Module Interfaces
The VSC8247YJB-02 fits CFP-module architectures requiring several recovered high-speed lanes in a compact package. The Microchip VSC8247 datasheet identifies 4×10G and 10×10G CFP-module designs as suitable applications for the family. Four channels and four outputs support the receiver side of a multi-lane module while limiting the number of discrete timing components. At these rates, controlled impedance, short high-speed traces, careful BGA escape routing, and a low-jitter reference clock are essential for dependable channel operation.
Recommended
Photonic Integrated Circuit Systems
The VSC8247YJB-02 is suitable for high-density photonic integrated circuit designs that require multiple recovered clock and data outputs from compact high-speed optical-electrical interfaces. Its four-channel implementation and 13 mm by 13 mm FCBGA package help align with the density goals of photonic modules and advanced communication equipment. The CDR and retimer functions can support cleaner downstream sampling of recovered lanes. Optical-module designers must evaluate channel bandwidth, loss tolerance, power delivery, thermal conditions, and package-level escape routing.
Recommended
Engineering reference data for VSC8247YJB-02 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Brand | Microchip Technology |
| Package | 144-FCBGA (13 mm x 13 mm) |
| Product Type | CDR and Retimer IC |
| Channel Count | 4 channels |
| Output Count | 4 outputs |
| Operating Line Rate | 8.5 Gbps to 11.3 Gbps |
| Ethernet Protocol Support | 10G Ethernet |
| Fibre Channel Support | 8G Fibre Channel |
| InfiniBand Support | 10G QDR InfiniBand |
| Telecom Protocol Support | SONET and SDH |
Key Differentiators
- Four recovery channels integrated in one device (vs A conventional single-channel clock buffer)
- Broad 10G-class line-rate coverage (vs A narrow-rate single-purpose CDR)
- High channel density in a compact package (vs Four discrete single-channel timing devices)
Design Notes
Treat every high-speed serial path as a controlled-impedance transmission line and follow the Microchip VSC8247 reference-layout guidance. Keep BGA escape routes short, minimize branch stubs, provide continuous reference planes, and place termination and decoupling components at the locations shown in the manufacturer design material. The 13 mm by 13 mm 144-FCBGA can support dense routing, but four adjacent multi-gigabit channels require disciplined differential trace geometry and careful separation from noisy power paths.
Evaluate the full receiver channel from connector or optical-device output through BGA escape routing, package parasitics, and PCB traces. Account for insertion loss, return loss, crosstalk, skew, and connector transitions when creating the jitter and eye-margin budget. The VSC8247 operating range of 8.5 Gbps to 11.3 Gbps identifies supported line rates, but it does not guarantee a particular channel margin without the physical interconnect and its loss characteristics.
Use the manufacturer-recommended power topology, decoupling values, and placement for every supply and ground connection. Place high-frequency decoupling capacitors close to the relevant 144-FCBGA balls and keep their current loops compact; route supply and return paths to minimize differential inductance. Separate sensitive clock and data-return paths from switching-node and high-current traces where the board stack-up permits, and confirm ripple and transient requirements against the device electrical limits.
Compliance Information
The manufacturer datasheet identifies the VSC8247 family, but the available product information does not state the requested compliance statuses. AEC-Q100 qualification is not indicated for this ordering code.
